unadvisable

Adjective

 * 1) Inadvisable.
 * 2) * 1948, William Burroughs, letter, 5 Jun 1948:
 * Will go back there to get it in a week or so, but may find the harvest unadvisable for reasons of security.
 * 1)  Unwilling to take advice.
 * 2)  Imprudent.
 * 1)  Imprudent.
 * 1)  Imprudent.

Usage notes

 * "Inadvisable" is used about 10 times more frequently than "unadvisable" at COCA (US usage) and 20 times more at BNC (UK written usage).